Merge data in SQL Server databases

I have two databases with identical tables structures. I need to merge the data in both databases without implementing merge replication. Can someone tell me what script to run that will compare the data in those tables? First I know the script has to search for data that doesn't exist in one table, the copy that over from the table that has extra rows. Thanks

AmmieNot sure how to help you unless you want to write a stored proc to do it.